2021 UM4

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O:8:”stdClass”:9:{s:2:”id”;s:8:”54213624″;s:12:”reference_id”;s:8:”54213624″;s:4:”name”;s:8:”2021 UM4″;s:6:”posted”;s:10:”2023-04-15″;s:7:”jpl_url”;s:46:”http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=54213624″;s:9:”magnitude”;d:27.8;s:8:”diameter”;O:8:”stdClass”:4:{s:10:”kilometers”;a:2:{s:22:”estimated_diameter_min”;d:0.0073207399;s:22:”estimated_diameter_max”;d:0.016369672;}s:6:”meters”;a:2:{s:22:”estimated_diameter_min”;d:7.3207398935;s:22:”estimated_diameter_max”;d:16.3696720474;}s:5:”miles”;a:2:{s:22:”estimated_diameter_min”;d:0.0045488955;s:22:”estimated_diameter_max”;d:0.0101716395;}s:4:”feet”;a:2:{s:22:”estimated_diameter_min”;d:24.0181762721;s:22:”estimated_diameter_max”;d:53.70627484;}}s:9:”hazardous”;b:0;s:13:”approach_data”;O:8:”stdClass”:6:{s:19:”close_approach_date”;s:10:”2023-04-15″;s:24:”close_approach_date_full”;s:17:”2023-Apr-15 03:41″;s:25:”epoch_date_close_approach”;i:1681530060000;s:17:”relative_velocity”;a:3:{s:21:”kilometers_per_second”;s:13:”25.7312642601″;s:19:”kilometers_per_hour”;s:15:”92632.551336491″;s:14:”miles_per_hour”;s:16:”57558.2650234991″;}s:13:”miss_distance”;a:4:{s:12:”astronomical”;s:12:”0.3234253637″;s:5:”lunar”;s:14:”125.8124664793″;s:10:”kilometers”;s:18:”48383745.513495319″;s:5:”miles”;s:19:”30064265.3635766422″;}s:13:”orbiting_body”;s:5:”Earth”;}}